Created
March 28, 2019 21:25
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The most terrifying healthcheck for an SMB server
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#!/bin/sh | |
if [ -z "$2" ]; then | |
echo "usage: [host] [share] [protocol?=smb2] [port?=8080]" | |
echo "example: localhost bar" | |
exit 1 | |
fi | |
HOST=$1 | |
SHARE=$2 | |
PROTOCOL=${3:-smb2} | |
PORT=${4:-8080} | |
ROOT=//$HOST/$SHARE | |
Check () { | |
echo "this is an smb healthcheck file" > test.foo | |
# make remote dir | |
echo "Making remote dir" | |
smbclient -N $ROOT -m $PROTOCOL -c "mkdir .smb-healthcheck" || return 1 | |
# upload file | |
echo "Uploading" | |
smbclient -N $ROOT -m $PROTOCOL --directory .smb-healthcheck -c "put test.foo" || return 2 | |
# download file | |
echo "Downloading" | |
smbclient -N $ROOT -m $PROTOCOL --directory .smb-healthcheck -c "get test.foo test.pulled" || return 3 | |
echo "Comparing" | |
if ! cmp -s test.foo test.pulled; then | |
echo "downloaded file does not match" | |
return 4 | |
fi | |
rm test.pulled | |
# delete uploaded file | |
echo "Deleting uploaded file" | |
smbclient -N $ROOT -m $PROTOCOL --directory .smb-healthcheck -c "rm test.foo" || return 5 | |
# delete created directory | |
echo "Deleting created directory" | |
smbclient -N $ROOT -m $PROTOCOL -c "rmdir .smb-healthcheck" || return 6 | |
# ensure directory is deleted | |
echo "Checking if directory deleted" | |
(smbclient -N $ROOT -m $PROTOCOL -c "cd .smb-healthcheck" && return 7) || return 0 | |
echo "everything ok" | |
} | |
GOOD_RESPONSE="HTTP/1.1 200 OK\r\nConnection: keep-alive\r\n\r\nOK\r\n" | |
BAD_RESPONSE="HTTP/1.1 500 OK\r\nConnection: keep-alive\r\n\r\nNOT OK\r\n" | |
while true | |
do | |
Check | |
if [ $? -eq 0 ]; then | |
RESPONSE="$GOOD_RESPONSE" | |
else | |
RESPONSE="$BAD_RESPONSE" | |
fi | |
echo -en "$RESPONSE" | nc -l "$PORT" | |
done |
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